This makes me think about bug 37181, but gnome-volume-manager has been patched in dapper and edgy to work around this bug.
Can you please do the steps on https://wiki.ubuntu.com/DebuggingRemovableDevices (first half of the page) and attach the logs? ** Visibility changed to: Public ** Changed in: Ubuntu Sourcepackagename: None => gnome-volume-manager Status: Unconfirmed => Needs Info -- bugs when multiple users are logged into same machine .... https://launchpad.net/bugs/60705 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs